/Engine/Plugins/Experimental/ScriptableToolsFramework/Source/ScriptableToolsFramework/Public/ScriptableInteractiveTool.h
OnScriptTick is called every Editor Tick, ie basically every frame. Implement per-frame processing here.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintImplementableEvent, Category="ScriptableTool|Events") void OnScriptTick ( float DeltaTime )